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Stock Due Approx. End August
$6,893.00 ex GST
This advanced multiparameter meter allows you to effortlessly measure and display up to 11 water quality parameters simultaneously, offering unmatched convenience and precision in one rugged field instrument. Built with an innovative control unit and smart sensor technology, it gives operators the flexibility to select which parameters are shown on the screen—ensuring a customizable, user-friendly experience every time.
Designed for efficiency in the field, this multiparameter meter is ideal for groundwater and surface water testing, combining intuitive software, robust construction, and high-performance accuracy for reliable environmental monitoring.
Clear LCD Display: Easily view selected parameters on a high-visibility screen
One-Hand Operation: Practical design for handheld field use
Smart Icons: Instantly check battery life, USB status, and probe connectivity
Quick-Connect Setup: Simplifies cable connection between probe and control unit
Shock-Resistant Cover: Built tough for outdoor and rugged environments
Backlit Display: Ensures readability in low-light or bright conditions
Low-Maintenance DO Sensor: Screw-on membrane cap minimizes upkeep
Chemical-Resistant Materials: Durable construction for long-term field use
Break-Resistant pH Electrode: Optional ToupH electrode for enhanced durability*
Field Replaceable Sensors: Swap sensors on-site for minimal downtime
Extensive Data Logging: Store up to 10,000 readings with time, date, and site name
USB Connectivity: Easily transfer data to a PC
Calibration Tracking: View recent calibration data and dates directly on the screen
pH, pHmV, ORP, conductivity, dissolved oxygen, temperature, salinity, total dissolved solids (TDS), specific gravity of seawater, and turbidity
This multiparameter meter is the perfect solution for professionals conducting water quality assessments across diverse field conditions.
Control unit and fully loaded probe assembly
Backpack-style carrying case
Spare D.O. membrane, filling solution, and spanner
pH reference solution, silicone grease
Calibration beaker set, 500 mL Auto-Cal solution
Sponge brush, batteries, and instruction manual
Optional heavy-duty carry case
USB cable and software for PC data download
For more technical details and to compare models, visit the ‘Specifications’ tab above.
| U-51 | U-52 | U-52G | U-53 | U-53G | ||
|---|---|---|---|---|---|---|
| pH | ✓ | ✓ | ✓ | ✓ | ✓ | |
| Dissolved Oxygen | ✓ | ✓ | ✓ | ✓ | ✓ | |
| Conductivity | ✓ | ✓ | ✓ | ✓ | ✓ | |
| Salinity | ✓ | ✓ | ✓ | ✓ | ✓ | |
| TDS(Total Dissolved Solid) | ✓ | ✓ | ✓ | ✓ | ✓ | |
| Seawater specific gravity | ✓ | ✓ | ✓ | ✓ | ✓ | |
| Temperature | ✓ | ✓ | ✓ | ✓ | ✓ | |
| Turbidity (LED) | — | ✓ | ✓ | — | — | |
| Turbidity (Tungsten lamp) | — | — | — | ✓ | ✓ | |
| Water depth | — | — | ✓ | ✓ | ✓ | |
| ORP (Oxidation Reduction Potential) | ✓ | ✓ | ✓ | ✓ | ✓ | |
| GPS | — | — | ✓ | — | ✓ |
Sensor Probe
| U- 51 |
U- 52 |
U- 52G |
U- 53 |
U- 53G |
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|---|---|---|---|---|---|---|---|
| Max.items displaying simultaneously | 10 | 11 | 11 | 11 | 11 | ||
| Measurement temperature | -10 to 55°C | ||||||
| Max. sensor diameter | Approx. 96mm | ||||||
| Probe length | Approx. 340mm | ||||||
| Cable length | Standard: 2m, Option: 10m,30 m | ||||||
| Mass | Approx. 1800g (Approx. 3.97 Ibs) |
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| Automatic calibration (use pH4) |
Applying to all models | ||||||
| Turbidity wiper | – | – | – | ✓ | ✓ | ||
| Measurement depth | Max. 30 m | ||||||
| Material contact with liquid | PPS, glass, SUS316L, SUS304, FKM, PEEK, Q,Titaniumu, FEP membrane, POM |
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| Water resistance | JIS protection livel 8 | ||||||
Monitor
| U-51 | U-52 | U-52G | U-53 | U-53G | |||
|---|---|---|---|---|---|---|---|
| Outer dimensions | 115(W) X 66(D) X 283(H) mm | ||||||
| Mass | Approx. 800 g (Approx. 1.76 Ibs) |
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| LCD | 320 X 240 liquid crystal display with backlight (black and white) | ||||||
| Data memory | 10,000 | ||||||
| Communication | USB | ||||||
| Battery | C batteries X 4 | ||||||
| Water resistance | JIS protection level 7 (when sensor cable is fitted) | ||||||
| Battery life | U-51, U-52, U-52G: Approx. 70 hours (without backlight)U-53, U-53G: Approx.500 measurements |
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| Storage temperature | -10 to 60°C | ||||||
| Ambient temperature | -5 to 45°C | ||||||
pH(All models in common)
| Specification attribute | Specification value |
|---|---|
| Measurement principle | Glass electrode method |
| Range | pH 0 to 14 |
| Resolution | 0.01pH |
| Repeatability | ±0.05pH |
| Accuracy | ±0.1pH |
Oxidation Reduction Potential (ORP)
| Specification attribute | Specification value |
|---|---|
| Measurement principle | Platinum electrode method |
| Range | -2000 mV to +2000 mV |
| Resolution | 1 mV |
| Repeatability | ±5 mV |
| Accuracy | ±15 mV |
Dissolved Oxygen (DO, All models in common)
| Specification attribute | Specification value |
|---|---|
| Measurement principle | Polarographic method |
| Range | 0 to 50.0 mg/L |
| Resolution | 0.01 mg/L |
| Repeatability | ±0.1 mg/L |
| Accuracy | 0 to 20 mg/L: ±0.2 mg/L 20 to 50 mg/L:±0.5 mg/L |
Conductivity (COND, All models in common)
| Specification attribute | Specification value |
|---|---|
| Measurement principle | 4 AC electrode method |
| Range | 0 to 10 S/m (0 to 100 mS/cm) |
| Resolution | 0.000 to 0.999 mS/cm:0.001 1.00 to 9.99 mS/cm: 0.01 10.0 to 99.9 mS/cm: 0.1 0.0 to 99.9 mS/m: 0.1 0.100 to 0.999 S/m: 0.001 1.00 to 9.99 S/m: 0.01 |
| Repeatability | ±0.05% F.S. |
| Accuracy | *±1% F.S. (Median of two-point calibration) |
Salinity
| Specification attribute | Specification value |
|---|---|
| Measurement principle | Conductivity conversion |
| Range | 0 to 70 PPT (permillage) |
| Resolution | 0.1 PPt |
| Repeatability | ±1 PPT |
| Accuracy | ±3 PPT |
Total Dissolved Solid (TDS)
| Specification attribute | Specification value |
|---|---|
| Measurement principle | Conductivity conversion |
| Range | 0 to 100 g/L |
| Resolution | 0.1% F.S. |
| Repeatability | ±2 g/L |
| Accuracy | ±5 g/L |
Seawater specific gravity
| Specification attribute | Specification value |
|---|---|
| Measurement principle | Conductivity conversion |
| Range | 0 to 50 δt |
| Resolution | 0.1 δt |
| Repeatability | ±2 δt |
| Accuracy | ±5 δt |
Temperature
| Specification attribute | Specification value |
|---|---|
| Measurement principle | Thermistor method |
| Range | -10 to 55°C |
| Resolution | 0.01°C |
| Repeatability | *±0.10°C (at calibration point) |
| Accuracy | JIS class B platinum thermometer sensor (±0.3+0.005 |t|) |
Turbidity (TURB)
| U-51 | U-52 | U-52G | U-53 | U-53G | ||
|---|---|---|---|---|---|---|
| Measurement principle | – | LED light source and 30°scattering method |
Tungsten lamp source and 90°scattering method |
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| Range | – | 0 to 800 NTU | 0 to 1000 NTU | |||
| Resolution | – | 0 to 99.9 NTU: 0.1, 100 to 800 NTU: 1 |
0 to 9.99 NTU: 0.01, 10 to 99.9 NTU: 0.1, 100 to 1000 NTU: 1, |
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| Repeatability | – | *±5% (reading) or ±0.5 NTU whichever is greater | ±3% (reading) or ±0.1 NTU whichever is greater | |||
| Accuracy | – | ±5% (reading) or ±1 NTU whichever is greater | 0 to 10 NTU: ±0.5 10 to 1000 NTU: 3% (reading) or ±1 NTU whichever is greater |
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Water depth
| U- 51 | U-52 | U-52G | U-53 | U-53G | |||
|---|---|---|---|---|---|---|---|
| Measurement principle | – | – | Pressure method | ||||
| Range | – | – | 0 to 30 m | ||||
| Resolution | – | – | 0.05 m | ||||
| Repeatability | – | – | ±1% F.S. | ||||
| Accuracy | – | – | ±0.3 m | ||||
GPS
12 channel parallel (This is availalble for U-52G, U-53G.)
Note:
*Battery life based on continuous operation using alkaline C dry batteries when the monitor temperature is over 20℃ and the backlight OFF.
*Accuracy is measured by calibrating 4 points for turbidity and electrical conductivity and 2 points for all other measurements against standard solution.
*Repeatability is measured by the ability to reproduce the results against the standard solution (at 25℃ normal pressure condition).
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